1. Time Synchronization Method: NTP, WiFi 2.4G or 5G, LTE-4G, LoRa wireless communication, etc. (choose one); 2. Clock Accuracy: Operating time accuracy: 20ms; 3. Power Supply Method: AC220V, POE, DC6V (choose one); 4. Timekeeping Method: Temperature-compensated crystal oscillator timekeeping; RTC annual error less than 1 minute without time source; 5. Display Method: Year, month, day, hour, minute, second, day of the week, temperature, lunar calendar; 6. Management Method: Operating status, time synchronization status, communication status, power on/off, self-reset, countdown, time zone, brightness, time synchronization cycle, network parameters; 7. Equipped with identity authentication function; 8. Fully domestically designed, with MCU, network communication chips, and components all domestically produced; 9. Hour, Minute, Second Display Size: 3 inches; 10. Display Color: Red; 11. Frame Material: 304 stainless steel frame, glass panel; 12. Protection Rating: IP54; 13. Corrosion Resistance Rating: WF1; 14. Installation Method: Ceiling mount, wall mount, wall recessed, production line workstation recessed; 15. Applications: Chemical pollution plants, explosion-proof plants, medical plants, biological research institutes.